My car is a Rover 75 Connoisseur SE 1796cc Petrol registered

Customer Question

A problem with loss of coolant resulted in new water pump,timing belt and hosepipes being fitted which appears to have cured the leak.However after driving for about 10 minutes or so the engine fan comes on.My mechanic said it is because there is air in the system and advised removing the radiator cap every morning allowing air to escape and topping up.I have been doing this now for about 4 days and some air does come out but the coolant level has only marginally lowered in the radiator and the max level is not really visible.Any ideas? The head cylinder gasket was renewed 20 months ago by a different garage.

The first thing that needs doing here is is to ensure that the expansion tank cap is in good condition - and renew it if in doubt. It has a pressure release valve in it which you cant do anything with if suspect -so it just has to be replaced. To be honest - I would do this right away given the situation -

IF then you still have problems - the next thing to do is to have the system "pressure bled" -- This is done with special equipment that most good garages have and it ensures that there is no air trapped in the system at all... this ruling that out. If that then cures it, you know thats it done.

If not - if you still have the same issues - then I suggest have the sensor for the fans renewed as that then would be seemingly faulty. At any rate , that then would be the next best / cost effective move - as the other suspects then are your head gaskets again - showing early signs of failure.

I dont really think from what you have said, that that is the case - It could be of course but I have outlined the correct and cost effective way of working forward through this one for you. Im assuming it has been checked for any head gasket issues already.. so thats the way forward on this one now for you...

Let me know if you need anything more on this at all -

>> >> Meantime -- Please click on the OK rating to Excellent ratings service for me now, Thank youfor that... and you can get back to me anytime if you need / wish..

Best Rgds, MIKE.

Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.

Ask a Car Mechanic

Get a Professional Answer. 100% Satisfaction Guaranteed.

Car Mechanics are Online Now

Type Your Car Question Here...

characters left:

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.